#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
using namespace std;


class Date
{
public:
	Date(int year = 1, int month = 1, int day = 1);

	void Printf()
	{
		cout << _year << "-" << _month << "-" << _day << endl;
	}

	bool operator < (const Date& x);
	bool operator == (const Date& x);
	bool operator <= (const Date& x);
	bool operator >= (const Date& x);
	bool operator > (const Date& x);
	bool operator != (const Date& x);




private:
	int _year;
	int _month;
	int _day;
};